211613564431 has 2 divisors, whose sum is σ = 211613564432. Its totient is φ = 211613564430.

The previous prime is 211613564389. The next prime is 211613564467. The reversal of 211613564431 is 134465316112.

211613564431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211613564431 - 2⁷ = 211613564303 is a prime.

It is a super-2 number, since 2×211613564431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211613564231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105806782215 + 105806782216.

It is an arithmetic number, because the mean of its divisors is an integer number (105806782216).

Almost surely, 2^211613564431 is an apocalyptic number.

211613564431 is a deficient number, since it is larger than the sum of its proper divisors (1).

211613564431 is an equidigital number, since it uses as much as digits as its factorization.

211613564431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The spelling of 211613564431 in words is "two hundred eleven billion, six hundred thirteen million, five hundred sixty-four thousand, four hundred thirty-one".